Rollup merge of #103625 - WaffleLapkin:no_tyctxt_dogs_allowed, r=compiler-errors

Accept `TyCtxt` instead of `TyCtxtAt` in `Ty::is_*` functions

Functions in answer:

- `Ty::is_freeze`
- `Ty::is_sized`
- `Ty::is_unpin`
- `Ty::is_copy_modulo_regions`

This allows to remove a lot of useless `.at(DUMMY_SP)`, making the code a bit nicer :3

r? `@compiler-errors`

compiler/rustc_monomorphize/src/collector.rs

@@ -1067,7 +1067,7 @@ fn find_vtable_types_for_unsizing<'tcx>(
     let ptr_vtable = |inner_source: Ty<'tcx>, inner_target: Ty<'tcx>| {
         let param_env = ty::ParamEnv::reveal_all();
         let type_has_metadata = |ty: Ty<'tcx>| -> bool {
-            if ty.is_sized(tcx.at(DUMMY_SP), param_env) {
+            if ty.is_sized(tcx, param_env) {
                 return false;
             }
             let tail = tcx.struct_tail_erasing_lifetimes(ty, param_env);